Brush



R. F. CHRISTOPHER 29315994 BRUSH Filed Nov. es, 193s fkk N muFQ;

x v- ATTORNEY.

Patented May 3, 19133 Z,li5,942

`iUN11-ED STTEs rarest orties BRUSH F, VChristopher, Euclid, @hie Application November 6, 1936, Serial No. 109,555

3 Claims.

The` invention relates to brushes especially designed for removing material from the edges of sheets and around bolt holes. These devices are madeespecially for the purpose of removing enamel, previous to the vitrifying step, from the edges of sheet metal plates and around the bolt holes in such plates; they are useful in the manufacture of stoves, refrigerators and similar devices fabricated from enameled sheet metal.

An object of the invention is to provide devices of this kind which are not likely to scratch or mar the sheet even in the hands of a relatively unskilled operator and which are at the same time effective to perform all the functions of the present bristle-type brushes used for the purpose.

A further object is the elimination of bristles which sometimes become bent and mar the soft surface of the unvitrified enamel beyond the point from which the same is intended to be removed and to avoid any bad effects from undue p-ressure of the brush against the work.

Other and more limited objects will be in part apparent and in part pointed out hereinafter in connection with the accompanying drawing wherein Fig. l is a plan View of an edging brush; Fig. 2 is a double size section on the line 2--2 of Fig. 1; Fig. 3 is a fragmentary section of one form of bolt hole brush; Fig. 4 is a bottom plan view of the brush of Fig. 3; Fig. 5 is a view similar to Fig. 3 showing a modified form of bolt hole brush; and Fig. 6 is a bottom plan view of the brush of Fig. 5.

Referring now to Figs. 1 and 2, the numeral IIJ indicates abacking member which is grasped in the hand of the operator. Secured to the surface of the. member IED as by a screw I I is a guide member I2 having a slotted portion I3 lying along the backing member III and receiving the screw II and an upstanding portion It adapted to engage the edge of the sheet to restrict the area on which the brush works to the width of the working element I5 of the brush, The working element I5 may be composed of felt or the equivalent having the prevailing ber direction extending parallel to the plane of the working face I6. Secured to the edge of the element Ill as by a screw I'I is a holding element I3 having a slot I9 receiving the screw IT and bent over, with an upper edge 20 embedded in the felt working element I5 adjacent to but spaced from the working face I6 of such working element. In view of the fact that the edge 2! is embedded in the felt I5, it will be obvious that a relatively unskilled operator may exert unusually large pres- (ol. :l5-9210) sure on the device without danger of causing the edge 2B of the holding element IB to engage the work. In view of the fact that the prevailing fiber direction is in the plane of the working face I6, it is obvious that the edge portion which overlies the edge 2Q of the member I3 will remain even and become frayed rather slowly. When such fraying does occur after continued use, it is a simple matter to renew the felt block I5. The term felt as herein used is not to be read in a limiting sense but is to be understood as includ- .ing various fibrous substances of substantially Iequivalent` properties, preferably only slightly compressible in normal use.

In Fig. 3 I have shown a bolt hole brush com- Y prising` a handle. portion 2|, a guide pin 22 eX- tending from the lower surface 23 thereof, a felt sleeve 2li surrounding the pin 22 and a holding sleeve 25 surrounding the felt sleeve 24 and serving the same purpose as the holding element I8 shown in Fig. 2, the principal difference residing in the fact that one of these devices is adapted for longitudinal motion along a straight or approximately straight edge while the other is adapted for rotary motion. The sleeve 25 may be beveled as indicated at 26 for easier insertion over the felt sleeve 2t. In use, the edge of fthe felt sleeve 24 adjacent its working surface will to some extent overlie the end of the sleeve 25. It will be obvious that this device is operated by inserting the projected portion of the pin 22 into the bolt hole and rotating the device.

In Fig. 5 I have shown a similar bolt brush comprising a handle 2l having a guide pin 28 extending therefrom, a felt washer or sleeve 29 surrounding the pin 28 and terminating short thereof and a holding ring 3f) received on the handle portion 2l. The sleeve 3! may be adjustably held in place by means of the screw 3l in like manner to the holding element I8 shown in Fig. 2. Preferably, the lower end 32 of the holding element is embedded in the felt 29 in substantially the same manner as the holding element IB is embedded in the felt block I5.

In all forms of the device I prefer to have the prevailing fiber direction lie in a plane parallel to the working face of the felt working elements.

From the foregoing it will be obvious that I have provided a class of devices well adapted for their inten-ded purposes and while I have shown and described certain illustrative embodiments I do not wish to be limited to the details of the disclosure but only in accordance with the appended claims and the prior art.

Having thus described my invention, what I claim is:

1. A device for removing coating material for a predetermined uniform distance from an edge of a coated surface comprising, in combination, a backing member, a guide member carried by said backing member and forming an angle therewith, a felt Working element positioned in the angle between said backing member and said guide member and having one surface in contact with said backing member and an adjacent surface in contact with said guide member, and a holding element engaging the face of said Working element opposite that engaged by said guide member, said guide member extending beyond the Working surface of said Working element and said holding member terminating just short thereof.

2, A device for removing coating material for a predetermined uniform distance from an edge of a coated surface comprising, in combination, a backing member having an extended at surface,

a guide member upstanding from said backing member and having a flat surface making an angle with said at surface of said backing member, a felt block received in said angle and a holding element engaging the surface of said block opposite that engaging the guide member, said guide member extending beyond the felt block, and said holding member terminating short of the Working surface thereof.

3. A device for removing coating material for a predetermined uniform distance from an edge of a coated surface, said edge defining an opening in such surface, comprising, in combination, a backing member, a pin projecting therefrom, an annular felt block receive-d snugly on said pin and engaging said backing member, said pin projecting beyond said felt block, and a sleeve received snugly on said felt bock and terminating short of the Working surface thereof.

RALPH F. CHRISTOPHER. 

